This is a letter from Muhammad ibn Abu Bakr (the son of Abu Bakr, the first "caliph") to muawiya. I also put muawiyas response back to him. This has been put on this site before but I havnt seen it in awhile. Its a good read if you never have.
From Muhammad son of Abu Bakr to the sinner Mu`awiyah son of Sakhr:
Peace of Allah unto those who obey Him from one who is peaceful to whoever accepts only Allah as his Master.
In His Omnipotence, Greatness, Power and Might, Allah did not create the creation in vain, nor due to a weakness in Him, nor to a need to what He creates. Rather, He created His beings so that they may worship him. He let some of them sin while keeping others on the right guidance. Some of them He left to suffer, and to some He granted happiness. Then He knowingly chose from them Muhammad to be the sole bearer of His Message. He selected him to receive His revelation and entrusted him to carry out His commandments. He sent him as His Messenger, bearer of glad tidings, and warner, to testify to the divine Books which were revealed before his time, and to guide people to uphold His injunctions. So he invited people to accept his mission through wisdom and beautiful exhortation. The first to respond positively to his call, to obey him, to believe in him, to put his all at his disposal, and to be a Muslim, was his brother and cousin Ali ibn Abu Talib. He believed him with regard to the knowledge of the unknown; he preferred him over everyone else he loved; he protected him with his own life; he solaced him in every precarious situation; he fought those whom he had fought and sought peace with those to whom he was peaceful. He never fled when death seemed imminent out of his love for his life; he came out as one unmatched in prowess; nobody could ever come close to what he undertook.
I saw how you tried to reach his lofty status, though you are what you are, while he is the one who stood out above the rest as the foremost in the doing of anything good and in embracing Islam. His conviction was most sincere, his offspring the best among all people, his wife the best of all women, whose cousin was the very best, whose brother traded his life on the Day of Mu'ta for the Pleasure of Allah, whose uncle is the master of martyrs on the Day of Uhud, whose father defended the Messenger of Allah and his mission, whereas you are the accursed and the son of the accursed. You and your father have never ceased plotting to undermine the religion of Allah, trying, both of you, to put out the light of Allah, rallying others behind you, spending your wealth and seeking the support of other tribes.
Thus did your father die, and in his footsteps are you now following. Those who testify against you are the very ones whom you seek to please, while those who resort to you are the pariahs from the remnants of parties, the leaders of hypocrisy, those who are the foremost in dissenting from the Messenger of Allah. Those who testify for Ali, though his virtues are quite obvious and merits eternal, are his supporters whom Allah, the Most Exalted One, mentioned and praised in the Qur'an over all others from the Muhajirs and the Ansars: they are with him battalions and valiant defenders, protecting him with their words, always ready to spill their blood to protect his, finding the truth in following him and perdition in opposing him.
Woe unto you! How dare you set yourself as an equal to Ali while he is the heir of the Messenger of Allah, his wasi, the father of his offspring, the first among the people to follow him, the very closest to him? He shares with him his secrets; he unfolds his affairs before him, while you are his enemy and the son of his enemy!
So enjoy your life as long as you can through the means of your falsehood, and let the son of al-As support your sinning, for your end seems to have come close, and your mischief seems to be waning: soon you will come to know who is to receive the lofty rewards!
And be informed that you are plotting against your own Lord Whose Might you do not fear, from achieving Whose Mercy you have despaired, and He will soon take you by surprise while you remain in the deluge of your conceit. And peace be with whoever follows the right guidance.
Jamharat Rasaail al-Arab, Vol. 1, p. 475.
Al-Mas`udi, Muruj al-Dhahab, Vol. 2, p. 59.
Ibn Abul-Hadid, Sharh Nahjul Balagha, Vol. 1, p. 283.
Here is the responce from muawiya
From Mu`awiyah son of Sakhr to the one who faults his own father, Muhammad son of Abu Bakr:
Peace unto those who obey Allah.
I have received your letter wherein you state what Allah has indicated of His Greatness, Might, and Omnipotence, and what He bestowed upon the Messenger of Allah, in addition to a great deal of talk which you authored to your own liking and which faults you and is offensive to your father.
In it you stated the merits of the son of Abu Talib and his age-old feats and kinship to the Messenger of Allah, his having supported and solaced the Prophet in each and every precarious and perilous situation. Your argument against me was produced by you praising someone else rather than demonstrating your own merits; so, you should praise the Lord Who has deprived you of such merits and bestowed them upon someone else.
I and your father used, during the life-time of our Prophet, to recognize the merits of Abu Talib's son, and the fact that his feats were greater than ours. When Allah chose for His Prophet (s) that which He has with him, completing His promise to him, permitting his mission to supersede that of all others, making his argument the uppermost, Allah caused him (blessings of Allah be upon him) to die. Your father and his Farooq were the first to snatch his right away from him and dispute with him regarding what rightfully belonged to him. This is something which they both agreed upon and for which they coordinated their efforts. Then they invited him to swear the oath of allegiance to them, but he slackened and was hesitant, so they harbored evil intentions against him and plotted to kill him. He, therefore, swore the oath of allegiance to them later on and yielded. Then their third person, Uthman, stood up to follow their guidance and walk in their footsteps, whereupon you and your friend faulted him for doing so. You did so to the extent that [you caused] even those who went to extremes in sinning to covet his post. You both harbored evil intentions against him till you achieved your common goal.
So be on your guard, O son of Abu Bakr, for you will see the evil of your affair. And do measure your span according to your own measure: you will then neither equal nor parallel one whose vision weighs as much as a mountain. Do not incline to overpower him, for even the most far-sighted person cannot realize the limits of his patience.
It was your father who paved for him what he paved, building his domain. If our condition is sound, your father is the first to receive credit for it, but if it is oppression, then your father went to extremes in oppressing, and we all are his accomplices: It was his guidance that we followed and whose conduct we emulated. Had it not been for what your father had done, we would not have disputed with the son of Abu Talib, and we would have surrendered to him. But we found your father doing so before us; therefore, we followed his example and emulated his deeds. Find fault with your father, then, for what he did, or refrain, and peace be with whoever returns to his senses, to the right guidance, and who repents.
Jamharat Rasaail al-Arab, Vol. 1, p. 477.
Al-Mas`udi, Muruj al-Dhahab, Vol. 2, p. 60.
Ibn Abul-Hadid, Sharh Nahjul Balagha, Vol. 1, p. 284.
Edited by Gibrael, 13 July 2011 - 07:49 AM.